Drill spray



T. W. HARRISON 'DRILL SPRAY Filed Nov. 21, 1924 INVENM WITNESS:

Patented Dec. 14, 19265.

THOMAS w. nannrsoiv, or carmen, Anzoivn.

DRILL SPRAY.

Application filed November 21, 1924. Serial No. 751,364.

This invention relates to an attachment for use in connection withpneumatic drills used in mining, or for other purposes, and has for itsobject the provision of a novel spraying device adapted to be mountedupon the drill chuck and supplied with water from a suitable source, thewater being fed to the Vattachment by al portion of the air pressureused for operating the drill.

An important object is. the provision of a device of this characterhaving a perforated spray nozzle for directing a plurality of streams ofwater against the surface being bored or drilled in order to wash awaythe chips and the like and to allay the dust.

Another object is the provision of a device of this character which maybe constructed as a complete and separate entity adapted to be engagedupon an already existing drill without necessitating any changes in theconstruction thereof.

An additional object is the provision of a device of this characterwhich will be simple and inexpensive in manufacture, easy to apply anduse, positive .in action, eicient and durable in service, and ageneralimprove ment in the art..

Vith the above and other objects and advantages in view, the inventionconsists in the details of construction to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawings, inwhich Figure 1 is a side elevation of a mining drill equipped with mydevice.

Figure 2 is a sectionvon'the line 2-2 of Figure 1.

Figure 3 is a detail longitudinal sectionv through the attachment.

Referring more particularly to the drawings, the letter A designates apneumatic drill of the type used in mines or other places, and Brepresents the chuck portion thereof. This chuck portion is used forholding a drill represented at C. In the present instance, the drill isrepresented as in upright or ver-tical position for cutting a hole inthe roofD of a mine tunnel or gallery. However, it should be understoodthat there is no limitation as to the manner of use as the inventiondoes not apply to the the drill itself.

In carrying out the invention, I provide a spraying attachment whichcomprises a body member 10 having a constricted or re duced portion 1 1telescopically engaged upon the chuck B of the drill. The other endofthe body 10 is formed with an outstanding flange 12 which isinternally threaded for the reception of an inwardly extendingexternally threaded-flange 13' on a cap 14 which is formed with acentral opening 15 accommodating the chuck B. The outer end of the body10 is preferably formed with a comparatively shallow recess 16 withinwhich is located a packing gasket 17 engaged by a depending centralextension 18' on the cap 111 for the purpose of making a tight jointwhich will prevent leakage around the chuck B. The structure of Ithe capand. body is such as to provide an annular chamber 19 from which extendsa plurality of holes 20 formed in the cap 14 for the purpose ofproviding a nozzle structure which will 'give a spray or plurality ofline streams.

The numeral 21 designates a suitable water supply pipe which extendsalong the drill A and connects at the point 23 with,4 a nipple 211 onthe body 10 having a passage 25 leading into t-he chamber 19. At thedischarge end of this passage 25 is a lip or flange 26 which willoperate to deflect the water laterally as it enters this chamber so thatit will bel discharged therefrom through all of the perforations 20 withequal pressure. The pipe 21 connects by a union 2 2 with a pipe 27connected with one branch of a T 28, from the opposite branch of whichextends a nip ple 29 on which is engaged a hose 30 equipped with a valve31 and leading from a suitable source of supply.

While it is quite true that the water may be forced through the pipe 21by any. desired means such as pressure at the source, I have in thepresent instance, shown a pipe 32 connected with the remaining branch ofthe T 28 and connected with the interior of the drill body A so that theair pressure used for operating the drill may be permitted to enter thepipe 21 for forcing the water to the spray nozzle. A suitable controlvalve 33 is interposed in the pipe 32 for varying the pressure.

In the operation of the device, it will be apparent that when the valves31 and 33 are opened to a greater or lesser extent, water will flowalong the pipe 21 into the chamber 19 and will be discharged through theholes or perforations 2O against the surface D being drilled, therebywashing away all chips and preventing the flying of any vdustwhatsoever.

Vass

From the foregoing description and a study of the drawings, it Will beapparent that l. have thus provided a very simply constructed andconsequently inexpensive device for the purpose speciied, which Willeiiiciently perform all the functions for which it is intended and whichmay be manufactured and sold as a complete and separate entity or unitadapted for engagement upon an already existing drill. Owing to theeyvness oir' the parts and the ruggedness of the construction, it isevident that there is very little to get ou-t of order so that thedevice Vshould have a longand satisfactory life. l

While l have shown and described the perferred embodimentof theinvention, it should be understood that I reserve the right to lmalteall changes in the form, construction and arrangement of parts as willnot depart form the spirit of the invention or the scope of thesubjoined claims.

Having thus described the invention, l claim: Y

LA spray device for drills, comprising the combination'with a drillchuck, ot a body member engaged thereon and having a recessed outerportion internally threaded, a cap member arranged in surrounding relation to the chuck and having an externally threaded flange ttingWithin and screwed into the threaded recess portion, said cap memberbeing formed with a plurality of perror-ations, arranged in parallelrelation to the longitudinal axis of the chuck, the body member beingformed with a passage at one side parallel to the longitudinal axis andleading out through a nipple, and a Water supply pipe detachablyconnected With said nipple.

2. A spray device for drills, comprising the combina-tion With a drillchuck, oi: a body member engaged thereon and having a recessed outerportion internally threaded, a cap member arranged insurroundingrelation to the chuck and having an externally threadedPiange fitting Within and screwedr into the threaded recess portion,said cap member being formed with a plurality of perforations, Varrangedin parallel relation to the longitudinal axis of the chuck, the bodymember being formed with a passage at one side parallel to thelongitudinal axis and leading outithrough'a nipple, and a Water supplypipe detachably connected With said nipple, said passage leading intothe chamber delined between the body member and the cap and having itsinner end curved whereby to discharge water toward the longitudinal axisof the chuck.

ln testimony whereof I aliix my signature.

THOMAS Vil. HARRISON.

